package sync_test

import (
	"fmt"
	"os"
	"sync"
)

type httpPkg struct{}

func (httpPkg) Get(url string) {}

var http httpPkg

// This example fetches several URLs concurrently,
// using a WaitGroup to block until all the fetches are complete.
func ExampleWaitGroup() {
	var wg sync.WaitGroup
	var urls = []string{
		"http://www.golang.org/",
		"http://www.google.com/",

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package imports

import (
	"cmd/go/internal/cfg"
	"sync"
)

var (
	tags     map[string]bool
	tagsOnce sync.Once
)

// Tags returns a set of build tags that are true for the target platform.
// It includes GOOS, GOARCH, the compiler, possibly "cgo",

limitations under the License.
*/

/*
Package populator implements interfaces that monitor and keep the states of the
caches in sync with the "ground truth".
*/
package populator

import (
	"context"
	"errors"
	"fmt"
	"sync"
	"time"

	"k8s.io/klog/v2"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/types"

// This code failed on arm64 in the register allocator.
// See issue 33355.

package server

import (
	"bytes"
	"sync"
)

type client struct {
	junk [4]int
	mu   sync.Mutex
	srv  *Server
	gw   *gateway
	msgb [100]byte
}

type gateway struct {
	cfg    *gatewayCfg
	outsim *sync.Map
}

type gatewayCfg struct {
	replyPfx []byte
}

type Account struct {
	Name string
}

limitations under the License.
*/

// Package kmsv2 transforms values for storage at rest using a Envelope v2 provider
package kmsv2

import (
	"crypto/rand"
	"crypto/sha256"
	"fmt"
	"sync"
	"sync/atomic"
	"testing"
	"time"

	"k8s.io/apimachinery/pkg/util/sets"
	"k8s.io/apiserver/pkg/storage/value"
	testingclock "k8s.io/utils/clock/testing"
)

func TestSimpleCacheSetError(t *testing.T) {

		log.Fatalf("Failed to start HTTPS server: %v", err)
	}
}

func (s *JWTServer) runHTTP(httpAddr string) {
	var wg sync.WaitGroup
	wg.Add(1)
	go s.startHTTP(httpAddr, &wg)
	wg.Wait()
}

func (s *JWTServer) runHTTPS(httpsAddr string) {
	var wg sync.WaitGroup
	wg.Add(1)
	go s.startHTTPS(httpsAddr, &wg)
	wg.Wait()
}

func (s *JWTServer) stop() {
	s.httpServer.Close()
}

//go:build dragonfly || freebsd || linux || netbsd || openbsd || solaris

package syscall

import "sync"

// forkExecPipe atomically opens a pipe with O_CLOEXEC set on both file
// descriptors.
func forkExecPipe(p []int) error {
	return Pipe2(p, O_CLOEXEC)
}

var (
	// Guard the forking variable.
	forkingLock sync.Mutex
	// Number of goroutines currently forking, and thus the

			StabilityLevel: metrics.ALPHA,
		},
		[]string{"status", "apiserver_id_hash"},
	)
)

var registerMetrics sync.Once
var hashPool *sync.Pool

func RegisterMetrics() {
	registerMetrics.Do(func() {
		hashPool = &sync.Pool{
			New: func() interface{} {
				return sha256.New()
			},
		}
		legacyregistry.MustRegister(encryptionConfigAutomaticReloadsTotal)

package par

import (
	"errors"
	"math/rand"
	"sync"
	"sync/atomic"
)

// Work manages a set of work items to be executed in parallel, at most once each.
// The items in the set must all be valid map keys.
type Work[T comparable] struct {
	f       func(T) // function to run for each item
	running int     // total number of runners

	mu      sync.Mutex
	added   map[T]bool // items added to set

/*
#cgo CFLAGS: -fsanitize=thread
#cgo LDFLAGS: -fsanitize=thread

void f(char *p) {
	*p = 1;
}
*/
import "C"

import (
	"runtime"
	"sync"
)

func main() {
	var wg sync.WaitGroup
	var mu sync.Mutex
	c := make(chan []C.char, 100)
	for i := 0; i < 10; i++ {
		wg.Add(2)
		go func() {
			defer wg.Done()
			for i := 0; i < 100; i++ {
				c <- make([]C.char, 4096)